Abstract
• An MIMI (metal-insulator-metal-insulator) similar multilayer absorber based on the concatenation of Indium Antimonide (InSb) and titanium (Ti) is proposed. • Finite-difference time-domain (FDTD) method is adopted to the MIMI absorption structure. • The structure has stable absorption performance near ultraviolet region (300nm) to part of near infrared region (1200nm). In this paper, a MIMI (metal-insulator-metal-insulator) similar multilayer absorber based on the Indium Antimonide (InSb) and titanium (Ti) is proposed. Finite-difference time-domain (FDTD) method is adopted to give the simulation result. The advised new planar structure (GaF 2 -TiO 2 -InSb-Ti-GaF 2 -Al) achieves ultra-wideband absorption from part near ultraviolet region (300nm) to the part near infrared region (1200nm). As comparing to the MIMI structure based on single transition metal, we have made a progress in expanding the absorption in UV region. The structure also has stable performance, besides insensitive to the changes in the dielectric coefficient of some similar materials, it retains the advantages of MIMI structure's large angle and polarization insensitivity, which further enhances its application potential in solar energy storage and controlled thermal emission.
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